Echinoid assemblage in Messinian calcarenitic facies from Alcalá de Guadaíra (Sevilla, SW Spain

The echinoid assemblage from the Messinian calcarenitic deposits of Alcalá de Guadaíra (Sevilla, SW Spain) has been studied. Six species have been recognised; Schizechinus duciei and Plagiobrissus costae are rather common. This association and its taphonomic signature suggest a shallow marine depositional environment in the infralittoral, characterised by coarse detritic bottoms and variable hidrodynamic energy. This echinoid association corroborates the attribution of the studied sediments to the Messinia

Preliminar paleontologic study from upper Tortonian deposits of «Las Pajanosas» (Sevilla, Guadalquivir Basin)

The paleontological record of a set of upper Tortonian outcrops nearby Las Pajanosas, north of Seville, has been studied. The most complete series of 15 metres of thickness, unconformed over upper Devonian metamorphic rocks, is divided in two sedimentary parts. 60 macrofaunal species have been identified. Bivalves group is the most abundant with 37 species, specially pectinids with 14 species. This outcrop presents the most diversity of pectinids in the Tortonian sections of the Guadalquivir Basin. The fossil content, distribution, taphonomy signature and sedimentological context, suggest a transgressive process over the paleorelief, with progressive deepening of the paleoenvironments in a global eustatic rising settin

Late Miocene Cymodocea seagrass in the Guadalquivir Basin (southern Spain)

This work was supported by Junta de Andalucia (Spain) Research Group RNM 190. Funding for open access charge: Universidad de Granada/CBUA. We are grateful to Manuel Vicente Maestre Galindo for his helpful comments during development of this research and to Francisco Gonzalez Portillo and Lola Molina for their help with macrophotography. We thank Isabel Sanchez-Almazo and Nicolas Velilla for carrying out the elemental and XR analyses of fossil samples, respectively.Despite the abundance of seagrass-related deposits in the geological record, seagrass macrofossils are scattered in time and space, due to the low preservation potential of marine angiosperms. Fossil seagrass impressions, mainly rhizomes occur in Messinian (late Miocene) marl beds intercalated in cross-bedded bioclastic limestones in the Guadalquivir Basin near Alcala de Guadaira in southern Spain. Vegetative characters indicate that most remains can be attributed to Cymodocea cf. nodosa, to which also probably belong a few molds of fruits. Two other fossil fragments can only be assigned to Alismatales indet. The plants lived in sheltered ephemeral areas among shallow-water submarine dunes, in which deposition of fine-grained sediment favored their fossilization. During the late Miocene the Guadalquivir Basin was open to the Atlantic Ocean and, therefore, these fossil occurrences lie within the modern biogeographic distribution of C. nodosa, the only species of the genus out of the Indo-West Pacific region. At the moment, it is the only record of seagrass fossils in the Miocene of Europe.Junta de Andalucia RNM 190Universidad de Granada/CBU

A new species of Bathynomus A. Milne-Edwards, 1879 (Malacostraca: Peracarida Isopoda: Cirolanidae) from the upper Miocene of the Guadalquivir Basin (Spain)

Hyžný, Matúš, Campos, Ildefonso Bajo, Carretero, Joaquín Cárdenas (2020): A new species of Bathynomus A. Milne-Edwards, 1879 (Malacostraca: Peracarida Isopoda: Cirolanidae) from the upper Miocene of the Guadalquivir Basin (Spain). Zootaxa 4819 (1): 159-169, DOI: https://doi.org/10.11646/zootaxa.4819.1.

Prospección paleontológica superficial en el sector Villanueva-Alcolea-Lora del Río (Sevilla)

Español: Se han caracterizado los yacimientos de invertebrados fósiles más relevantes (principalmente equinodermos y moluscos) de edad Mioceno superior (Tortoniense superior, -8-7 millones de años) localizados entre los términos de Villanueva del Río y Minas, Alcolea del Río y Lora del Río (Sevilla). Así mismo, se ha hecho un estudio acerca del patrimonio paleontológico conservado en las canteras y se sugieren las vías administrativas para proporcionar una mejor prevención y protección de los yacimientos. Inglés: The most important sites bearing fossil invertebrates (mainly echinoderms and molluscs) upper Miocene in age (upper Tortonian, -8,7 million years) located between Villanueva del Río y Minas, Alcolea del Río and Lora del Río (Seville) are characterized. As well, a study about the paleontological heritage preserved in the quarries are done and administrative solutions are suggested in order to give a best prevention and protection of this sites. Francés: Les plus importantes gisements d´invertébrés fossiles (échinodermes et molusques principalement) correspondant au Miocène supérieur (Tortonien supérieur, -8,7 m.a) situés entre les termes de Villanueva del Río y Minas, Alcolea del Río et Lora del Río (Seville) ont été caractérisés. Aussi, un étude sur le patrimoine paléontologique conservé dans les carrières a été présenté et plusieurs solutions administratives sont proposées pour améliorer la prévention et la protection des gisements